Marvel Comics has been headlined by a variety of superhero teams, the most famous of which being the Avengers. Debuting as a team in 1963, the Avengers originally assembled Thor, Iron Man, Hulk, Ant-Man and the Wasp to expand the universe's protection against threats. As the years passed, the team expanded, and the likes of Captain America and Black Widow signed up. The world of indie comics likewise has many candidates who could join Marvel's premier hero team.
Source:https://www.cbr.com/indie-comic-heroes-avengers-wishlist/